"1 Section One" 1
"2 Section 1 + 1 = 2" 1
    "2.1 Subsection Two.One" 1
"e ln(3)" 2
    "3.1 Subsection e ln(3) .1, with looo- ooooooooong title" 2
    "3.2 S ubsection Three.Two, another long title" 3
    "3.3 Subsection Three.Three" 3
"4 The x → ∞ End" 3
